package com.io.config;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Map;

/**
 * Created by yangyx on 2016/7/27.
 */
public class SpringContextUtil implements ApplicationContextAware {
    // Spring应用上下文环境
    private static ApplicationContext applicationContext;
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 获取对象
     * @param name
     * @return Object
     * @throws BeansException
     */
    public static Object getBean(String name) throws BeansException {
        return applicationContext.getBean(name);
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static <T> T getBean(Class<T> clazz) {
        Map beanMaps = applicationContext.getBeansOfType(clazz);
        if (beanMaps != null && !beanMaps.isEmpty()) {
            return (T) beanMaps.values().iterator().next();
        } else {
            return null;
        }
    }

}